package com.gzc.just.play.last.war.loginserver.sdk;

import com.gzc.just.play.last.war.loginserver.config.SDKConfig;
import com.gzc.just.play.last.war.loginserver.sdk.model.LoginRequest;
import com.gzc.just.play.last.war.loginserver.sdk.model.LoginResponse;
import com.gzc.just.play.last.war.loginserver.sdk.model.SDKUser;
import com.gzc.just.play.last.war.loginserver.sdk.model.UserPlatform;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Component;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * SDK连接器
 * 对应C++的SDKAsynHandler类，负责与各种SDK平台进行通信
 */
@Component
public class SDKConnector {
    private static final Logger logger = LoggerFactory.getLogger(SDKConnector.class);
    
    @Autowired
    private SDKConfig sdkConfig;
    
    // SDK平台连接器映射
    private final Map<UserPlatform, PlatformConnector> platformConnectors = new ConcurrentHashMap<>();
    
    // 异步任务执行器，使用虚拟线程
    private ExecutorService virtualThreadExecutor;
    
    // 请求ID生成器
    private final AtomicInteger requestIdGenerator = new AtomicInteger(1000);
    
    // 请求状态映射
    private final Map<Integer, CompletableFuture<LoginResponse>> pendingRequests = new ConcurrentHashMap<>();
    
    @PostConstruct
    public void init() {
        logger.info("Initializing SDKConnector");
        
        // 初始化虚拟线程执行器
        virtualThreadExecutor = Executors.newVirtualThreadPerTaskExecutor();
        
        // 初始化各平台连接器
        initPlatformConnectors();
        
        logger.info("SDKConnector initialized with {} platforms", platformConnectors.size());
    }
    
    @PreDestroy
    public void destroy() {
        // 关闭所有平台连接器
        platformConnectors.values().forEach(PlatformConnector::shutdown);
        platformConnectors.clear();
        
        // 关闭虚拟线程执行器
        if (virtualThreadExecutor != null && !virtualThreadExecutor.isShutdown()) {
            virtualThreadExecutor.shutdown();
        }
        
        logger.info("SDKConnector destroyed");
    }
    
    /**
     * 初始化各平台连接器
     */
    private void initPlatformConnectors() {
        // 根据配置初始化各平台连接器
        if (sdkConfig.isPlatformEnabled(UserPlatform.PC)) {
            platformConnectors.put(UserPlatform.PC, new PCConnector(sdkConfig));
        }
        
        if (sdkConfig.isPlatformEnabled(UserPlatform.ANDROID)) {
            platformConnectors.put(UserPlatform.ANDROID, new AndroidConnector(sdkConfig));
        }
        
        if (sdkConfig.isPlatformEnabled(UserPlatform.IOS)) {
            platformConnectors.put(UserPlatform.IOS, new IOSConnector(sdkConfig));
        }
        
        if (sdkConfig.isPlatformEnabled(UserPlatform.WECHAT)) {
            platformConnectors.put(UserPlatform.WECHAT, new WeChatConnector(sdkConfig));
        }
        
        if (sdkConfig.isPlatformEnabled(UserPlatform.QQ)) {
            platformConnectors.put(UserPlatform.QQ, new QQConnector(sdkConfig));
        }
        
        if (sdkConfig.isPlatformEnabled(UserPlatform.WEIBO)) {
            platformConnectors.put(UserPlatform.WEIBO, new WeiboConnector(sdkConfig));
        }
    }
    
    /**
     * 异步检查登录
     */
    @Async
    public CompletableFuture<LoginResponse> checkLoginAsync(LoginRequest request) {
        int requestId = requestIdGenerator.incrementAndGet();
        
        logger.info("Checking login for platform: {}, username: {}, requestId: {}", 
                   request.getPlatform(), request.getUsername(), requestId);
        
        // 创建异步响应Future
        CompletableFuture<LoginResponse> responseFuture = new CompletableFuture<>();
        pendingRequests.put(requestId, responseFuture);
        
        // 获取对应的平台连接器
        PlatformConnector connector = platformConnectors.get(request.getPlatform());
        if (connector == null) {
            logger.error("No connector found for platform: {}", request.getPlatform());
            
            LoginResponse errorResponse = LoginResponse.failure(
                requestId, 
                "Unsupported platform: " + request.getPlatform()
            );
            responseFuture.complete(errorResponse);
            pendingRequests.remove(requestId);
            return responseFuture;
        }
        
        // 在虚拟线程中执行登录检查
        CompletableFuture.runAsync(() -> {
            try {
                // 调用平台连接器进行登录验证
                LoginResponse response = connector.checkLogin(request, requestId);
                
                // 完成异步响应
                responseFuture.complete(response);
            } catch (Exception e) {
                logger.error("Error checking login for requestId: {}", requestId, e);
                
                LoginResponse errorResponse = LoginResponse.failure(
                    requestId, 
                    "Login check failed: " + e.getMessage()
                );
                responseFuture.complete(errorResponse);
            } finally {
                // 清理请求状态
                pendingRequests.remove(requestId);
            }
        }, virtualThreadExecutor);
        
        return responseFuture;
    }
    
    /**
     * 同步检查登录（阻塞等待）
     */
    public LoginResponse checkLogin(LoginRequest request) {
        try {
            CompletableFuture<LoginResponse> future = checkLoginAsync(request);
            return future.get(); // 阻塞等待结果
        } catch (Exception e) {
            logger.error("Error in synchronous login check", e);
            return LoginResponse.failure(-1, "Login check exception: " + e.getMessage());
        }
    }
    
    /**
     * 取消待处理的登录请求
     */
    public boolean cancelPendingRequest(int requestId) {
        CompletableFuture<LoginResponse> future = pendingRequests.remove(requestId);
        if (future != null && !future.isDone()) {
            return future.cancel(true);
        }
        return false;
    }
    
    /**
     * 获取待处理请求的数量
     */
    public int getPendingRequestCount() {
        return pendingRequests.size();
    }
    
    /**
     * 平台连接器接口
     */
    public interface PlatformConnector {
        /**
         * 检查登录
         */
        LoginResponse checkLogin(LoginRequest request, int requestId);
        
        /**
         * 关闭连接器
         */
        void shutdown();
        
        /**
         * 获取平台类型
         */
        UserPlatform getPlatform();
    }
    
    /**
     * PC平台连接器
     */
    public static class PCConnector implements PlatformConnector {
        private final SDKConfig sdkConfig;
        private static final Logger logger = LoggerFactory.getLogger(PCConnector.class);
        
        public PCConnector(SDKConfig sdkConfig) {
            this.sdkConfig = sdkConfig;
            logger.info("PC Platform Connector initialized");
        }
        
        @Override
        public LoginResponse checkLogin(LoginRequest request, int requestId) {
            logger.debug("Checking PC login for username: {}", request.getUsername());
            
            try {
                // PC平台的特殊处理逻辑
                // 这里简化处理，实际应该调用相应的SDK接口
                String username = request.getUsername();
                String password = request.getPassword();
                
                // 验证用户名和密码
                if (isValidCredentials(username, password)) {
                    SDKUser user = new SDKUser();
                    user.setUserId(generateUserId(username));
                    user.setUsername(username);
                    user.setPlatform(UserPlatform.PC);
                    user.setDeviceId(request.getDeviceId());
                    
                    return LoginResponse.success(requestId, user);
                } else {
                    return LoginResponse.failure(requestId, "Invalid username or password");
                }
            } catch (Exception e) {
                logger.error("Error in PC login check", e);
                return LoginResponse.failure(requestId, "Login check error: " + e.getMessage());
            }
        }
        
        @Override
        public void shutdown() {
            logger.info("PC Platform Connector shutdown");
        }
        
        @Override
        public UserPlatform getPlatform() {
            return UserPlatform.PC;
        }
        
        private boolean isValidCredentials(String username, String password) {
            // 简化的验证逻辑，实际应该与数据库或用户服务进行验证
            return username != null && !username.isEmpty() && 
                   password != null && !password.isEmpty();
        }
        
        private long generateUserId(String username) {
            // 简化的用户ID生成逻辑
            return username.hashCode() & 0x7FFFFFFFL;
        }
    }
    
    /**
     * Android平台连接器
     */
    public static class AndroidConnector implements PlatformConnector {
        private final SDKConfig sdkConfig;
        private static final Logger logger = LoggerFactory.getLogger(AndroidConnector.class);
        
        public AndroidConnector(SDKConfig sdkConfig) {
            this.sdkConfig = sdkConfig;
            logger.info("Android Platform Connector initialized");
        }
        
        @Override
        public LoginResponse checkLogin(LoginRequest request, int requestId) {
            logger.debug("Checking Android login for username: {}", request.getUsername());
            
            try {
                // Android平台的特殊处理逻辑
                String username = request.getUsername();
                String token = request.getToken();
                String deviceId = request.getDeviceId();
                
                // 验证Android设备和令牌
                if (isValidAndroidToken(token, deviceId)) {
                    SDKUser user = new SDKUser();
                    user.setUserId(generateUserId(username));
                    user.setUsername(username);
                    user.setPlatform(UserPlatform.ANDROID);
                    user.setDeviceId(deviceId);
                    user.setToken(token);
                    
                    return LoginResponse.success(requestId, user);
                } else {
                    return LoginResponse.failure(requestId, "Invalid Android token or device");
                }
            } catch (Exception e) {
                logger.error("Error in Android login check", e);
                return LoginResponse.failure(requestId, "Login check error: " + e.getMessage());
            }
        }
        
        @Override
        public void shutdown() {
            logger.info("Android Platform Connector shutdown");
        }
        
        @Override
        public UserPlatform getPlatform() {
            return UserPlatform.ANDROID;
        }
        
        private boolean isValidAndroidToken(String token, String deviceId) {
            // 简化的Android令牌验证逻辑
            return token != null && !token.isEmpty() && 
                   deviceId != null && !deviceId.isEmpty();
        }
        
        private long generateUserId(String username) {
            return username.hashCode() & 0x7FFFFFFFL;
        }
    }
    
    /**
     * iOS平台连接器
     */
    public static class IOSConnector implements PlatformConnector {
        private final SDKConfig sdkConfig;
        private static final Logger logger = LoggerFactory.getLogger(IOSConnector.class);
        
        public IOSConnector(SDKConfig sdkConfig) {
            this.sdkConfig = sdkConfig;
            logger.info("iOS Platform Connector initialized");
        }
        
        @Override
        public LoginResponse checkLogin(LoginRequest request, int requestId) {
            logger.debug("Checking iOS login for username: {}", request.getUsername());
            
            try {
                // iOS平台的特殊处理逻辑
                String username = request.getUsername();
                String token = request.getToken();
                String deviceId = request.getDeviceId();
                
                // 验证iOS设备和令牌
                if (isValidIOSToken(token, deviceId)) {
                    SDKUser user = new SDKUser();
                    user.setUserId(generateUserId(username));
                    user.setUsername(username);
                    user.setPlatform(UserPlatform.IOS);
                    user.setDeviceId(deviceId);
                    user.setToken(token);
                    
                    return LoginResponse.success(requestId, user);
                } else {
                    return LoginResponse.failure(requestId, "Invalid iOS token or device");
                }
            } catch (Exception e) {
                logger.error("Error in iOS login check", e);
                return LoginResponse.failure(requestId, "Login check error: " + e.getMessage());
            }
        }
        
        @Override
        public void shutdown() {
            logger.info("iOS Platform Connector shutdown");
        }
        
        @Override
        public UserPlatform getPlatform() {
            return UserPlatform.IOS;
        }
        
        private boolean isValidIOSToken(String token, String deviceId) {
            // 简化的iOS令牌验证逻辑
            return token != null && !token.isEmpty() && 
                   deviceId != null && !deviceId.isEmpty();
        }
        
        private long generateUserId(String username) {
            return username.hashCode() & 0x7FFFFFFFL;
        }
    }
    
    /**
     * 微信平台连接器
     */
    public static class WeChatConnector implements PlatformConnector {
        private final SDKConfig sdkConfig;
        private static final Logger logger = LoggerFactory.getLogger(WeChatConnector.class);
        
        public WeChatConnector(SDKConfig sdkConfig) {
            this.sdkConfig = sdkConfig;
            logger.info("WeChat Platform Connector initialized");
        }
        
        @Override
        public LoginResponse checkLogin(LoginRequest request, int requestId) {
            logger.debug("Checking WeChat login for code: {}", request.getCode());
            
            try {
                // 微信平台的特殊处理逻辑
                String code = request.getCode();
                
                // 验证微信授权码
                if (isValidWeChatCode(code)) {
                    // 调用微信API获取用户信息
                    SDKUser user = getWeChatUserInfo(code);
                    if (user != null) {
                        return LoginResponse.success(requestId, user);
                    }
                }
                
                return LoginResponse.failure(requestId, "Invalid WeChat code");
            } catch (Exception e) {
                logger.error("Error in WeChat login check", e);
                return LoginResponse.failure(requestId, "Login check error: " + e.getMessage());
            }
        }
        
        @Override
        public void shutdown() {
            logger.info("WeChat Platform Connector shutdown");
        }
        
        @Override
        public UserPlatform getPlatform() {
            return UserPlatform.WECHAT;
        }
        
        private boolean isValidWeChatCode(String code) {
            // 简化的微信授权码验证逻辑
            return code != null && !code.isEmpty();
        }
        
        private SDKUser getWeChatUserInfo(String code) {
            // 简化的微信用户信息获取逻辑
            SDKUser user = new SDKUser();
            user.setUserId(generateUserId(code));
            user.setUsername("WeChatUser_" + System.currentTimeMillis());
            user.setPlatform(UserPlatform.WECHAT);
            user.setOpenId("OpenId_" + code.hashCode());
            user.setToken(code);
            
            return user;
        }
        
        private long generateUserId(String code) {
            return code.hashCode() & 0x7FFFFFFFL;
        }
    }
    
    /**
     * QQ平台连接器
     */
    public static class QQConnector implements PlatformConnector {
        private final SDKConfig sdkConfig;
        private static final Logger logger = LoggerFactory.getLogger(QQConnector.class);
        
        public QQConnector(SDKConfig sdkConfig) {
            this.sdkConfig = sdkConfig;
            logger.info("QQ Platform Connector initialized");
        }
        
        @Override
        public LoginResponse checkLogin(LoginRequest request, int requestId) {
            logger.debug("Checking QQ login for code: {}", request.getCode());
            
            try {
                // QQ平台的特殊处理逻辑
                String code = request.getCode();
                
                // 验证QQ授权码
                if (isValidQQCode(code)) {
                    // 调用QQ API获取用户信息
                    SDKUser user = getQQUserInfo(code);
                    if (user != null) {
                        return LoginResponse.success(requestId, user);
                    }
                }
                
                return LoginResponse.failure(requestId, "Invalid QQ code");
            } catch (Exception e) {
                logger.error("Error in QQ login check", e);
                return LoginResponse.failure(requestId, "Login check error: " + e.getMessage());
            }
        }
        
        @Override
        public void shutdown() {
            logger.info("QQ Platform Connector shutdown");
        }
        
        @Override
        public UserPlatform getPlatform() {
            return UserPlatform.QQ;
        }
        
        private boolean isValidQQCode(String code) {
            // 简化的QQ授权码验证逻辑
            return code != null && !code.isEmpty();
        }
        
        private SDKUser getQQUserInfo(String code) {
            // 简化的QQ用户信息获取逻辑
            SDKUser user = new SDKUser();
            user.setUserId(generateUserId(code));
            user.setUsername("QQUser_" + System.currentTimeMillis());
            user.setPlatform(UserPlatform.QQ);
            user.setOpenId("OpenId_" + code.hashCode());
            user.setToken(code);
            
            return user;
        }
        
        private long generateUserId(String code) {
            return code.hashCode() & 0x7FFFFFFFL;
        }
    }
    
    /**
     * 微博平台连接器
     */
    public static class WeiboConnector implements PlatformConnector {
        private final SDKConfig sdkConfig;
        private static final Logger logger = LoggerFactory.getLogger(WeiboConnector.class);
        
        public WeiboConnector(SDKConfig sdkConfig) {
            this.sdkConfig = sdkConfig;
            logger.info("Weibo Platform Connector initialized");
        }
        
        @Override
        public LoginResponse checkLogin(LoginRequest request, int requestId) {
            logger.debug("Checking Weibo login for code: {}", request.getCode());
            
            try {
                // 微博平台的特殊处理逻辑
                String code = request.getCode();
                
                // 验证微博授权码
                if (isValidWeiboCode(code)) {
                    // 调用微博API获取用户信息
                    SDKUser user = getWeiboUserInfo(code);
                    if (user != null) {
                        return LoginResponse.success(requestId, user);
                    }
                }
                
                return LoginResponse.failure(requestId, "Invalid Weibo code");
            } catch (Exception e) {
                logger.error("Error in Weibo login check", e);
                return LoginResponse.failure(requestId, "Login check error: " + e.getMessage());
            }
        }
        
        @Override
        public void shutdown() {
            logger.info("Weibo Platform Connector shutdown");
        }
        
        @Override
        public UserPlatform getPlatform() {
            return UserPlatform.WEIBO;
        }
        
        private boolean isValidWeiboCode(String code) {
            // 简化的微博授权码验证逻辑
            return code != null && !code.isEmpty();
        }
        
        private SDKUser getWeiboUserInfo(String code) {
            // 简化的微博用户信息获取逻辑
            SDKUser user = new SDKUser();
            user.setUserId(generateUserId(code));
            user.setUsername("WeiboUser_" + System.currentTimeMillis());
            user.setPlatform(UserPlatform.WEIBO);
            user.setOpenId("OpenId_" + code.hashCode());
            user.setToken(code);
            
            return user;
        }
        
        private long generateUserId(String code) {
            return code.hashCode() & 0x7FFFFFFFL;
        }
    }
}